Boiler



(No Model.) v 2 Sheets-sheen 2.-. J. J. MEEHA'N.

BOILER.

' No. 574,925.Y

Patente Jan. 12, 1897.

v UNITED STATES PATENT OFFICE.

JOHN J. MEEHAN, OF NEW CASTLE, PENNSYLVANIA.

BOILER.

SPECIFICATION forming part of Letters Patent No. 574,925, dated January12, 1897.

Application filed January 3, 1896- Serial No. 574,198. (No model.)

To all whom, it may concern:

Beit known that I, JOHN J. MEEHAN, a resident of New Castle, in thecounty of Lawrence and State of Pennsylvania, have invented a new anduseful Improvement in Boilers; and I do hereby declare the following tobe a full, clear, and exact description thereof.

My invention relates to boilers, and more especially to certainimprovements in what is known to the trade as the horizontal type ofwater-tube boiler.

Referring to the accompanying drawings, Figure l is a longitudinalsection of a boilerfurnace with my improved boiler contained therein.Fig. 2 is a section on the line 2 2, Fig. l. Fig. 3 is a section on theline 3 3, Fig. l, showing the boiler proper without the smoke-nuesextending through it. Fig. et is an enlarged view of the water-feedingapparatus, and Fig. 5 is an enlarged detail View of the manner ofsupporting the cross-drum.

Like letters indicate like parts in each of the gures.

The letter d designates the walls of the boiler-furnace inclosing theparts of my improved boiler. 'Ihe letter b indicates the grate-bars inthe lire-chamber at the front end of the furnace, said furnace beingprovided with the custom ary charging and cleaning doors. The tubes care connected up with the legs d d in the ordinary manner, the stayboltse acting to strengthen said legs. The legs d d are preferably formed ofwrought iron or steel bent to the proper form and se-` cured to thewrought-iron drums or enlargements ff. The drums or enlargements j' fmay be formed integral with said legs, if desired. Openings d2 areformed in the outer faces of the legs d d', said openings being providedwith suitable caps cl3, whereby upon removing said caps access may behad to the tubes c for purposes of cleaning same. v rlhe tubes c aresupported at a slight incline, and the ends of said tubes are expandedinto openings in the legs d CZ, whereby a close connection is obtained.

As stated, the legs d d are connected up with the drums or enlargementsff', communication between said legs and said drums being afforded bymeans of theopenings f2. These drums ff' extend across the front andrear of the furnace and are supported by the wrought-steel beams f3, thesaid drums resting in saddles f4 f5. The saddle f5 has interposedbetween it and the top of the beam f3 the rollers f6. By thisconstruction upon the expansion of the tubes connecting the legs anddrums the front drum f is free to move as the saddle f5 can move overthe rollers f6. In this manner all strain on the legs and drulns due tothe expansion and contraction is relieved. The drums f f are connectedlup by the tubes g, said tubes entering said drums at a slight curve, sothat they converge toward each other on radial lines. In order toprovide for the removal and cleaning of the tubes g, I constructopenings h in the front drum f at points about opposite to theconvergent ends of the tubes g, connecting the drums ff.

By having the openings arranged in the manner described one of saidopenings gives access to several tubes on account of the convergence ofsaid tubes, whereby the tubes may be readily cleaned or removed. In thisway only one opening is required for each series of tubes, which is anew and novel feature. These openings h are provided with suitable capsor covers h', secured in any convenient manner. The tubes g are likewisesupported at a slight incline, the drum f being slightly higher than thedrum f'. The drums ff are connected to the longitudinal drums jj' bymeans vof the pipes lo k'.

The longitudinal drums j j' may have the smoke-flues )"2 extendingthrough them, or the smoke-dues may be omitted, if desired, andthe smokecarried around the drumsjj', as shown in Fig. The smoke-iiuesj2communicate with the stack orchimney jg.

I n order that the products of combustion coming from the {ire-chambermay pass in an indirect course through the furnace, I interposebaffle-walls at suitable intervals. The baffle-wall Z is formed ofsuitable tiling and is supported chieflyby the cross-wall d. Thebaffle-wall Z is made up of several tiles arranged in the followingmanner: The tiles Z are built up on the cross-wall a and are formed inthe seats Z2 at the corners, which, when brought into coincidence witheach other, form openings for the passage of the tubes c and g. As thereis a larger space between the two sets of tubes c and g, l em- IOO ploythe larger tiles Z3 for this space. The baffle-wall m is constructed inthe same manner as the wall l, said wall having, however, the additionalrow of tiles m', which are supported from behind by the angle-bar 'm2and the depending wall a2. By this construction the baille-walls may bequickly removed to withdraw the tubes and rebuilt again. By thisconstruction the products of combustion pass up from the iire-chamberover the baillewall Z., down underneath the baffie-wall fm, up andthrough the iiues .7'2 to the stack jg, whereby the tubes are thoroughlyheated at all points.

Vithin the longitudinal drums j j are located the 1n lid-depositingdrums 0, strengthened by the tie-bolts o. The waterssupply pipe p passesthrough the longitudinal drum and enters the mud-depositing drum o. Thismud-depositing drum 0 has the openings o2 formed in the top thereof andthe baffle-plates 03. These baffle-plates 03 are located in front ofeach opening and are inclined at an angle therefrom. As the water entersthe drum o the baffle-plates o3 prevent its passing directly through theopenings o2 into the boiler. On the contrary, the water strikes thebaille-plates 03 and mud or sediment is deposited on these plates, andthe water is thus to a certain eX- tent filtered and purified before itpasses into the boiler. The mud orsediment drops from the baiiles o3 tothe bottom of said drum o, and is carried off by means of the pipe q tothe mud-drum r without the furnace-Walls. The mud-drum r is alsoconnected up with the leg d by the pipe 1", whereby any sedimentcollecting in said leg is carried olf by said pipe o" and the mud-drumr. By this construction, before the water is permitted to circulatethrough the tubes, a great part of the mud or sediment is deposited, sothat the clogging up of the `tubes and other parts of the boiler islargely avoided.

The operation of my improved boiler is as follows: Water having been fedthereto until it reaches the proper line within the longitudinal drums,fire is lighted upon the grate-bars b, and as the pipes c and g becomeheated the circulation of the water is from the drumsjlj' down throughthe pipes k into the enlargement f and leg d', thence up through thepipes c and g tothe leg d and enlargement f back again to thelongitudinal drums. The front cross-drum f permits of the separation ofthe steam, owing to the said enlargement projecting out beyond the legsand affording a larger space. This separation of the steam in the frontcross-drum f is also due to the fact that said drum is located in thefront or hottest partol the furnace. By-this construction the area forliberation of steam and water is increased about fifty per cent., whilethe separation of the steam within the front crossdrum f reduces theebullition within the longitudinal drums, and a better circulation isobtained. A chamber is furnished intermediate of the front leg and thehorizontal drums of such a size as to alle7 for the expansion and freeliberation of the steam. I am able to employ wrought-iron legs rivetedto the drums ff', which has many advantages over any previous formationof boilers for strength and cost of material. At thesame time by the useof the enlargements f f I can do away with a great number of the capsfor covering the openings in the legs and am able by the use of theopenings in said enlargements t0 clean and remove a number of pipes bythe removal of a single cap.

lVhen it is desired to apply my invention to an old boiler where thereis not sufficient space for the cross-drums and the legs, said legs maybe omitted.

That I claim as my invention, and desire to secure by Letters Patent,is-

l. Ina boiler, the combination ofy a series of tubes, legs connected bysaid tubes, crossdrums communicating with said legs and with the mainwater-drum above, and a second series of tubes connecting saidcross-drums, substantially as set forth.

2. In a boiler, the combination of a series of tubes, legs connected bysaid tubes, a crossdrum interposed between the frontleg and thc mainwater-drum above, a series of tubes entering said eross-drum, saidlast-mentioned tubes having converging ends, said crossdrum having anopening therein at a point opposite the points of entrance of saidconverging tubes into said cross-drum, substantially as set forth.

3. The combination of a boiler, a closed rceeptaele coni ained therein asu pply-pipe leading to said receptacle, said receptacle having openingsin the top thereof, balde-plates adjacent to said openings, a pipeleading from said receptacle to a mud-drum without the furnace-walls, aleg connected to said boiler and a pipe leading from said leg to saidmuddrum, substantially as set forth.

In testimony whereof I, the said JOHN J. MEEIIAN, have hereunto set myhand.

JOHN J. MEEIIAN'.` lVitnesses:

ERRETT E. PHILLIrs, JOHN B. BROWN.

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